The Experts below are selected from a list of 2331 Experts worldwide ranked by ideXlab platform

V. Szleper - One of the best experts on this subject based on the ideXlab platform.

  • An indicator approach for describing the spatial variability of artificial Stream networks with regard to herbicide pollution in cultivated watersheds
    Ecological Indicators, 2006
    Co-Authors: Philippe Lagacherie, O. Diot, N. Domange, V. Gouy, C. Floure, C. Kao, Roger Moussa, J.m. Robbez-masson, V. Szleper
    Abstract:

    Abstract Artificial Stream networks play a major role in water and pollutant transfer within cultivated watersheds. Since the characteristics of these artificial Stream network (e.g. width, vegetation cover, presence of sediments, etc.) are highly variable in space and in time, describing their variability appears as a prerequisite for assessing environmental risk of pollution at watershed scale. In this perspective an indicator approach is presented which includes three steps: (a) collecting properties of reach (i.e. Elementary Stream) along an artificial Stream networks by means of a field and GIS-based approach, (b) deriving from these properties a set of quantitative indicators of hydrological and chemical processes involved in herbicide transfer, (c) classifying reaches in terms of their role in herbicide transfers on the basis of these indicators. The application of this method to three different watersheds located in France – Roujan watershed (South), La Morcille (East-Centre) and Le Cetrais (North-West) – confirms that artificial Stream networks of cultivated watersheds are highly spatially variable in regard to pollutant transfer. This spatial variability includes both variations between the watersheds and variations within the watersheds. Furthermore, the study reveals that the Stream network properties can also be variable in time.

  • An indicator approach for describing the spatial variability of artificial Stream networks with regard to herbicide pollution in cultivated watersheds
    Ecological Indicators, 2006
    Co-Authors: Philippe Lagacherie, O. Diot, N. Domange, V. Gouy, C. Floure, C. Kao, Roger Moussa, J.m. Robbez-masson, V. Szleper
    Abstract:

    Artificial Stream networks play a major role in water and pollutant transfer within cultivated watersheds. Since the characteristics of these artificial Stream network (e.g. width, vegetation cover, presence of sediments, etc.) are highly variable in space and in time, describing their variability appears as a prerequisite for assessing environmental risk of pollution at watershed scale. In this perspective an indicator approach is presented which includes three steps: (a) collecting properties of reach (i.e. Elementary Stream) along an artificial Stream networks by means of a field and GIS-based approach, (b) deriving from these properties a set of quantitative indicators of hydrological and chemical processes involved in herbicide transfer, (c) classifying reaches in terms of their role in herbicide transfers on the basis of these indicators. The application of this method to three different watersheds located in France - Roujan watershed (South), La Morcille (East-Centre) and Le Cétrais (North-West) - confirms that artificial Stream networks of cultivated watersheds are highly spatially variable in regard to pollutant transfer. This spatial variability includes both variations between the watersheds and variations within the watersheds. Furthermore, the study reveals that the Stream network properties can also be variable in time.

C. Herpel - One of the best experts on this subject based on the ideXlab platform.

  • MPEG-4 Systems: Elementary Stream management
    Signal Processing-image Communication, 2000
    Co-Authors: C. Herpel, Alexandros Eleftheriadis
    Abstract:

    We describe the Elementary Stream management (ESM) facilities provided by MPEG-4 Systems. Within the extensive set of tools defined by MPEG-4, the ESM tools play a critical role in joining several building blocks together. ESM provides a dual to the scene description language (BIFS) in that it links the Streaming resources of a presentation to the scene. We also describe the synchronization functionality as well as the system decoder model that defines the timing behavior and buffer resource management of MPEG-4 receivers. The paper concludes with considerations on data packaging in underlying delivery layer protocols and a description of the MPEG-4 content access procedure.

  • Elementary Stream management in MPEG-4
    IEEE Transactions on Circuits and Systems for Video Technology, 1999
    Co-Authors: C. Herpel
    Abstract:

    The forthcoming MPEG-4 standard specifies in its systems part an audiovisual scene description and functionality for the Elementary Stream management. The Elementary Stream management functionality is introduced. It consists of a media object description framework that describes the Streaming resources that form part of an MPEG-4 presentation and of a synchronization syntax incorporated in a flexible sync layer with an underlying systems decoder model. The final section outlines the transport and session setup for MPEG-4 presentations on relevant transport media, namely, the Internet and in digital broadcast scenarios.

Philippe Lagacherie - One of the best experts on this subject based on the ideXlab platform.

  • An indicator approach for describing the spatial variability of artificial Stream networks with regard to herbicide pollution in cultivated watersheds
    Ecological Indicators, 2006
    Co-Authors: Philippe Lagacherie, O. Diot, N. Domange, V. Gouy, C. Floure, C. Kao, Roger Moussa, J.m. Robbez-masson, V. Szleper
    Abstract:

    Abstract Artificial Stream networks play a major role in water and pollutant transfer within cultivated watersheds. Since the characteristics of these artificial Stream network (e.g. width, vegetation cover, presence of sediments, etc.) are highly variable in space and in time, describing their variability appears as a prerequisite for assessing environmental risk of pollution at watershed scale. In this perspective an indicator approach is presented which includes three steps: (a) collecting properties of reach (i.e. Elementary Stream) along an artificial Stream networks by means of a field and GIS-based approach, (b) deriving from these properties a set of quantitative indicators of hydrological and chemical processes involved in herbicide transfer, (c) classifying reaches in terms of their role in herbicide transfers on the basis of these indicators. The application of this method to three different watersheds located in France – Roujan watershed (South), La Morcille (East-Centre) and Le Cetrais (North-West) – confirms that artificial Stream networks of cultivated watersheds are highly spatially variable in regard to pollutant transfer. This spatial variability includes both variations between the watersheds and variations within the watersheds. Furthermore, the study reveals that the Stream network properties can also be variable in time.

  • An indicator approach for describing the spatial variability of artificial Stream networks with regard to herbicide pollution in cultivated watersheds
    Ecological Indicators, 2006
    Co-Authors: Philippe Lagacherie, O. Diot, N. Domange, V. Gouy, C. Floure, C. Kao, Roger Moussa, J.m. Robbez-masson, V. Szleper
    Abstract:

    Artificial Stream networks play a major role in water and pollutant transfer within cultivated watersheds. Since the characteristics of these artificial Stream network (e.g. width, vegetation cover, presence of sediments, etc.) are highly variable in space and in time, describing their variability appears as a prerequisite for assessing environmental risk of pollution at watershed scale. In this perspective an indicator approach is presented which includes three steps: (a) collecting properties of reach (i.e. Elementary Stream) along an artificial Stream networks by means of a field and GIS-based approach, (b) deriving from these properties a set of quantitative indicators of hydrological and chemical processes involved in herbicide transfer, (c) classifying reaches in terms of their role in herbicide transfers on the basis of these indicators. The application of this method to three different watersheds located in France - Roujan watershed (South), La Morcille (East-Centre) and Le Cétrais (North-West) - confirms that artificial Stream networks of cultivated watersheds are highly spatially variable in regard to pollutant transfer. This spatial variability includes both variations between the watersheds and variations within the watersheds. Furthermore, the study reveals that the Stream network properties can also be variable in time.

Alexandros Eleftheriadis - One of the best experts on this subject based on the ideXlab platform.

  • MPEG-4 Systems: Elementary Stream management
    Signal Processing-image Communication, 2000
    Co-Authors: C. Herpel, Alexandros Eleftheriadis
    Abstract:

    We describe the Elementary Stream management (ESM) facilities provided by MPEG-4 Systems. Within the extensive set of tools defined by MPEG-4, the ESM tools play a critical role in joining several building blocks together. ESM provides a dual to the scene description language (BIFS) in that it links the Streaming resources of a presentation to the scene. We also describe the synchronization functionality as well as the system decoder model that defines the timing behavior and buffer resource management of MPEG-4 receivers. The paper concludes with considerations on data packaging in underlying delivery layer protocols and a description of the MPEG-4 content access procedure.

V. Gouy - One of the best experts on this subject based on the ideXlab platform.

  • An indicator approach for describing the spatial variability of artificial Stream networks with regard to herbicide pollution in cultivated watersheds
    Ecological Indicators, 2006
    Co-Authors: Philippe Lagacherie, O. Diot, N. Domange, V. Gouy, C. Floure, C. Kao, Roger Moussa, J.m. Robbez-masson, V. Szleper
    Abstract:

    Abstract Artificial Stream networks play a major role in water and pollutant transfer within cultivated watersheds. Since the characteristics of these artificial Stream network (e.g. width, vegetation cover, presence of sediments, etc.) are highly variable in space and in time, describing their variability appears as a prerequisite for assessing environmental risk of pollution at watershed scale. In this perspective an indicator approach is presented which includes three steps: (a) collecting properties of reach (i.e. Elementary Stream) along an artificial Stream networks by means of a field and GIS-based approach, (b) deriving from these properties a set of quantitative indicators of hydrological and chemical processes involved in herbicide transfer, (c) classifying reaches in terms of their role in herbicide transfers on the basis of these indicators. The application of this method to three different watersheds located in France – Roujan watershed (South), La Morcille (East-Centre) and Le Cetrais (North-West) – confirms that artificial Stream networks of cultivated watersheds are highly spatially variable in regard to pollutant transfer. This spatial variability includes both variations between the watersheds and variations within the watersheds. Furthermore, the study reveals that the Stream network properties can also be variable in time.

  • An indicator approach for describing the spatial variability of artificial Stream networks with regard to herbicide pollution in cultivated watersheds
    Ecological Indicators, 2006
    Co-Authors: Philippe Lagacherie, O. Diot, N. Domange, V. Gouy, C. Floure, C. Kao, Roger Moussa, J.m. Robbez-masson, V. Szleper
    Abstract:

    Artificial Stream networks play a major role in water and pollutant transfer within cultivated watersheds. Since the characteristics of these artificial Stream network (e.g. width, vegetation cover, presence of sediments, etc.) are highly variable in space and in time, describing their variability appears as a prerequisite for assessing environmental risk of pollution at watershed scale. In this perspective an indicator approach is presented which includes three steps: (a) collecting properties of reach (i.e. Elementary Stream) along an artificial Stream networks by means of a field and GIS-based approach, (b) deriving from these properties a set of quantitative indicators of hydrological and chemical processes involved in herbicide transfer, (c) classifying reaches in terms of their role in herbicide transfers on the basis of these indicators. The application of this method to three different watersheds located in France - Roujan watershed (South), La Morcille (East-Centre) and Le Cétrais (North-West) - confirms that artificial Stream networks of cultivated watersheds are highly spatially variable in regard to pollutant transfer. This spatial variability includes both variations between the watersheds and variations within the watersheds. Furthermore, the study reveals that the Stream network properties can also be variable in time.